I'm trying to understand if this book is best-seller, why there's many reporting where it's been sold at half-price and on the first day it's launched. Is it some kind of marketing strategy? Because logically if something sells well, keeping the price will mean more revenue, right? So why cut the price?
I suspect it's because the publisher (or the retailer) knows there's a whole army of consumers who will buy the book out of sheer nosiness or for the gossip drama if it's selling for 10 pounds, but not if it's selling for 20 pounds.
The publisher might view number of units sold as a more important metric than money earned. Especially with a book like this.